Effect of ionizing (gamma) and non-ionizing (UV) radiation on the development of Trichogramma euproctidis (Hymenoptera: Trichogrammatidae)

Abstract

The potential of using gamma and ultraviolet radiation as an alternative treatment to increase the efficiency of Trichogramma euproctidis (Girault 1911) (Hymenoptera: Trichogrammatidae) was investigated in the laboratory. The developmental and adult stages of T. euproctidis were exposed to gamma radiation of different doses (0-30 Gy) and ultraviolet radiation of 254 nm wavelengths (UV-C) for different durations (0-10 min) to assess their effect on each of the instars and their potential in breaking the developmental cycle of the egg parasitoid. The LD50 values for eggs, prepupae, pupae and adults were 8.1, 10.0, 22.7 and 9.5 Gy for gamma radiation and 9.5, 0.12, 2.0 and 11.9 min for UV radiation, respectively. The pupa and adult stages were more radioresistant to both gamma and UV radiation. The most interesting and unexpected result obtained for the prepupal stage was that UV radiation has a greater effect on prepupal stages than gamma radiation

Quality of grain and oil of maize subjected to UV‐C radiation (254 nm) for the control of weevil ( Sitophilus zeamais Motschulsky)

“…Our different results could be attributed to our irradiation treatment being applied to the grains containing the eggs and larvae of weevils, while that Faruki et al (2007); and Ghanem and Shamma (2007) irradiated eggs and larvae in Petri plates, therefore receiving strong direct radiation. According to Tuncbilek, Ercan, and Canpolat (2012), the UV-C radiation has superficial action, thus not reaching the eggs and larvae that are mainly deep inside the grain, thereby indicating FERREIRA ET AL. | 3 of 7 its ineffectiveness as a practical pest-control treatment technique for these weevil immature stages, as observed in treatments 5 and 6 ( Figure 1a).…”

The bracts of the alpine ‘glasshouse’ plantRheum alexandrae(Polygonaceae) enhance reproductive fitness of its pollinating seed-consuming mutualist

“…The embryonic stage of an insect is thought to be a period of UV radiation sensitivity (Tilton & Brower, ). Several studies have shown that intense UV (especially UV‐B/C) radiation reduces egg hatching significantly, and the percentage of hatched eggs decreases with increasing duration of exposure (Guerra, Ouye & Bullock, ; Faruki et al ., ; Tuncbilek, Ercan & Canpolat, ). As Song et al .…”

Morphological Changes and Colony Activity in Honeybee Workers Apis mellifera Produced from Irradiated Queens.

“…Some insects are sensitive for radition (Mazza et al, 2010) found that the Thrips were maximally sensitive to wavelengths between 290 and 330 nm. Some insects are different in their sensitive to radiation dependent on different stages such as Trichogramma euproctidis, (Tuncbilek et al, 2012) found that the developmental and adult stages of T. euproctidis were exposed to gamma radiation of different doses (0-30 Gy) and ultraviolet radiation of 254 nm wavelengths (UV-C) for different durations (0-10 min) to assess their effect on each of the instars and their potential in breaking the developmental cycle of the egg parasitoid. The adult and pupa stages were more radio resistant to both gamma and UV radiation.…”